Sci-fi shows have incredible potential for greatness, but very few manage to pull off a perfect run with no bad seasons.

As time goes on, most television shows, especially those in the sci-fi genre, tend to lose their initial spark, except for one Fox series.

Whether it may be a hilarious comedy, intense drama, or mind-altering sci-fi, some of the best TV series provide viewers with engaging content from beginning to end, that leaves an incredible impact.